How to update data in a C# ListView?

To update the data in a ListView in C#, you can follow these steps:

1. Create a ListView widget and configure its properties such as number of columns, size, style, etc.
2. Create a List object or other data source to store the data to be displayed in the ListView.
3. Add the data from the data source to each row in the ListView one by one.
4. Whenever new data is needed, refresh the data source, clear the data in the ListView, and then add the new data one by one to the ListView again.

Here is a simple example code demonstrating how to update the data in a ListView:

// 创建ListView控件
ListView listView1 = new ListView();
listView1.View = View.Details;
listView1.Columns.Add("Name");
listView1.Columns.Add("Age");

// 创建数据源
List<Person> dataSource = new List<Person>();
dataSource.Add(new Person("John", 25));
dataSource.Add(new Person("Mary", 30));

// 将数据添加到ListView中
foreach(Person person in dataSource)
{
    ListViewItem item = new ListViewItem(person.Name);
    item.SubItems.Add(person.Age.ToString());
    listView1.Items.Add(item);
}

// 更新数据
dataSource.Clear();
dataSource.Add(new Person("Tom", 35));
dataSource.Add(new Person("Lisa", 28));

// 清空ListView中的数据
listView1.Items.Clear();

// 将新数据添加到ListView中
foreach(Person person in dataSource)
{
    ListViewItem item = new ListViewItem(person.Name);
    item.SubItems.Add(person.Age.ToString());
    listView1.Items.Add(item);
}

// 自定义Person类
public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }

    public Person(string name, int age)
    {
        Name = name;
        Age = age;
    }
}

The above code first creates a ListView control and adds two columns (Name and Age). Then it creates a simple custom class called Person as the data source to store the data to be displayed in the ListView. When loading the data, it iterates through each Person object in the data source, creates a ListViewItem for each one, and adds it to each row in the ListView. Finally, when updating the data, it first clears the data in the ListView, and then adds the new data one by one back to the ListView.

Please modify the code according to your needs and optimize it appropriately based on actual circumstances.